In this study,we introduce our newly developed measurement-fed-perception self-adaption Low-cost UAV Coordinated Carbon Observation Network(LUCCN)prototype.The LUCCN primarily consists of two categories of instruments...In this study,we introduce our newly developed measurement-fed-perception self-adaption Low-cost UAV Coordinated Carbon Observation Network(LUCCN)prototype.The LUCCN primarily consists of two categories of instruments,including ground-based and UAV-based in-situ measurement.We use the GMP343,a low-cost non-dispersive infrared sensor,in both ground-based and UAV-based instruments.The first integrated measurement campaign took place in Shenzhen,China,4 May 2023.During the campaign,we found that LUCCN’s UAV component presented significant data-collecting advantages over its ground-based counterpart owing to the relatively high altitudes of the point emission sources,which was especially obvious at a gas power plant in Shenzhen.The emission flux was calculated by a crosssectional flux(CSF)method,the results of which differed from the Open-Data Inventory for Anthropogenic Carbon dioxide(ODIAC).The CSF result was slightly larger than others because of the low sampling rate of the whole emission cross section.The LUCCN system will be applied in future carbon monitoring campaigns to increase the spatiotemporal coverage of carbon emission information,especially in scenarios involving the detection of smaller-scale,rapidly varying sources and sinks.展开更多
BACKGROUND Liver condition is a crucial prognostic factor for patients with hepatocellular carcinoma(HCC),but a convenient and comprehensive method to assess liver condition is lacking.Liver stiffness(LS)measured by t...BACKGROUND Liver condition is a crucial prognostic factor for patients with hepatocellular carcinoma(HCC),but a convenient and comprehensive method to assess liver condition is lacking.Liver stiffness(LS)measured by two-dimensional shear wave elastography may help in assessing liver fibrosis and liver condition.Chronic hepatitis B(CHB)is an important risk factor for HCC progression,but LS was found to be less reliable in assessing liver fibrosis following hepatitis viral eradication.We hypothesize that the status of hepatitis virus infection would affect the accuracy of LS in assessing the liver condition.AIM To test the feasibility and impact factors of using LS to assess liver condition in patients with HCC and CHB.METHODS A total of 284 patients were retrospectively recruited and classified into two groups on the basis of serum CHB virus hepatitis B virus(HBV)-DNA levels[HBV-DNA≥100.00 IU/mL as Pos group(n=200)and<100.00 IU/mL as Neg group(n=84)].Correlation analyses and receiver operating characteristic analyses were conducted to evaluate the relationship between LS and liver condition.RESULTS A significant correlation was found between LS and most of the parameters considered to have the ability to evaluate liver condition(P<0.05).When alanine aminotransferase(ALT)concentrations were normal(≤40 U/L),LS was correlated with liver condition indices(P<0.05),but the optimal cutoff of LS to identify a Child-Pugh score of 5 was higher in the Neg group(9.30 kPa)than the Pos group(7.40 kPa).When ALT levels were elevated(>40 U/L),the correlations between LS and liver condition indices were not significant(P>0.05).CONCLUSION LS was significantly correlated with most liver condition indices in patients with CHB and HCC.However,these correlations varied according to differences in HBV-DNA and transaminase concentrations.展开更多
脑小血管病(small vessel disease,SVD)是一类以脑内小血管受损为主的临床影像综合征,可能会导致卒中、血管性认知障碍、神经心理疾病与其他功能障碍等。自2013年血管性神经病变的影像报告标准(standards for reporting vascular change...脑小血管病(small vessel disease,SVD)是一类以脑内小血管受损为主的临床影像综合征,可能会导致卒中、血管性认知障碍、神经心理疾病与其他功能障碍等。自2013年血管性神经病变的影像报告标准(standards for reporting vascular changes on neuroimaging,STRIVE)发布以来,SVD的神经影像学特征得到了初步的分类与标准化。然而,在临床实践与科学研究中,对SVD影像特征的认识和应用仍存在诸多不一致和不规范之处。随着对SVD病理生理机制的深入探索与影像技术的不断进步,新的SVD影像特征和定量标志物被相继发现,为SVD的诊断和评估提供了更为全面且精准的信息。在此基础上,STRIVE-2应运而生,以期能更全面地揭示SVD对脑功能与结构的影响。为了规范中国SVD的神经影像学评估和诊断,本共识将在STRIVE-2的基础上,结合中国具体国情,对SVD的神经影像学特征进行深入解读,旨在推动SVD影像学诊断术语的标准化,提高临床诊断的准确性,进一步促进相关领域的研究与进步。展开更多
ⅠI have not done much preparation for today,since it is the end of the year and I have my hands full.Over the past years,I have had several opportunities to express my opinions,and I do not really have any new ones.T...ⅠI have not done much preparation for today,since it is the end of the year and I have my hands full.Over the past years,I have had several opportunities to express my opinions,and I do not really have any new ones.Today,I look forward to taking some specific questions from you to exchange our ideas,so I hope this lecture will be rewarding for you.展开更多
目的:骨水泥强化椎弓根螺钉技术近年来被广泛应用于合并骨质疏松的脊柱内固定手术中,可以显著提高固定强度,但与常规椎弓根螺钉内固定比较是否更具有优势尚缺乏循证医学定论。文章系统评价骨水泥强化椎弓根螺钉固定治疗骨质疏松性胸腰...目的:骨水泥强化椎弓根螺钉技术近年来被广泛应用于合并骨质疏松的脊柱内固定手术中,可以显著提高固定强度,但与常规椎弓根螺钉内固定比较是否更具有优势尚缺乏循证医学定论。文章系统评价骨水泥强化椎弓根螺钉固定治疗骨质疏松性胸腰椎退行性疾病的临床疗效及安全性。方法:在中国知网、中国生物医学文献、万方、维普、PubMed、Cochrane Library、Web of Science以及Embase数据库中,检索有关传统椎弓根螺钉与骨水泥强化螺钉固定治疗骨质疏松性胸腰椎退行性疾病的临床对照研究,按相关标准对文献进行筛选和质量评价,采用Rev Man 5.4软件进行Meta分析。结果:①纳入2篇随机对照研究和18篇回顾性队列研究,共20篇文献,包括1566例患者,其中骨水泥强化螺钉组789例,传统螺钉组777例;②Meta分析结果显示,骨水泥强化螺钉组术后日本矫形外科协会评分、椎间隙高度及融合率均高于传统螺钉组(MD=1.60,95%CI:1.14,2.07,P<0.00001;MD=1.26,95%CI:0.62,1.90,P=0.0001;OR=11.24,95%CI:2.86,44.14,P=0.0005),手术时间长于传统螺钉组(SMD=0.82,95%CI:0.42,1.23,P<0.0001),术后目测类比评分、Oswestry功能障碍指数及螺钉松动率均低于传统螺钉组(MD=-0.50,95%CI:-0.78,-0.21,P=0.0007;SMD=-0.49,95%CI:-0.88,-0.10,P=0.01;OR=0.08,95%CI:0.05,0.12,P<0.00001),两组间住院时间、术中出血量、术后引流量比较差异无显著性意义(P>0.05)。结论:相较于传统椎弓根螺钉固定,骨水泥强化椎弓根螺钉固定治疗骨质疏松性胸腰椎退行性疾病时更能有效改善术后融合率及椎间隙高度、降低术后螺钉松动率,提高远期临床疗效。展开更多
基金supported by the National Key Research and Development Plan(Grant No.2021YFB3901000)the Chinese Academy of Sciences Project for Young Scientists in Basic Research(YSBR-037)+2 种基金the International Partnership Program of the Chinese Academy of Sciences(060GJHZ2022070MI)the MOST-ESA Dragon-5 Programme for Monitoring Greenhouse Gases from Space(ID.59355)the Finland–China Mobility Cooperation Project funded by the Academy of Finland(No.348596)。
文摘In this study,we introduce our newly developed measurement-fed-perception self-adaption Low-cost UAV Coordinated Carbon Observation Network(LUCCN)prototype.The LUCCN primarily consists of two categories of instruments,including ground-based and UAV-based in-situ measurement.We use the GMP343,a low-cost non-dispersive infrared sensor,in both ground-based and UAV-based instruments.The first integrated measurement campaign took place in Shenzhen,China,4 May 2023.During the campaign,we found that LUCCN’s UAV component presented significant data-collecting advantages over its ground-based counterpart owing to the relatively high altitudes of the point emission sources,which was especially obvious at a gas power plant in Shenzhen.The emission flux was calculated by a crosssectional flux(CSF)method,the results of which differed from the Open-Data Inventory for Anthropogenic Carbon dioxide(ODIAC).The CSF result was slightly larger than others because of the low sampling rate of the whole emission cross section.The LUCCN system will be applied in future carbon monitoring campaigns to increase the spatiotemporal coverage of carbon emission information,especially in scenarios involving the detection of smaller-scale,rapidly varying sources and sinks.
基金Supported by Natural Science Foundation of Guangdong Province,No.2023A1515012464 and No.2022A1515011716Basic and Applied Basic Research Foundation of Guangdong Province,No.2022A1515110666。
文摘BACKGROUND Liver condition is a crucial prognostic factor for patients with hepatocellular carcinoma(HCC),but a convenient and comprehensive method to assess liver condition is lacking.Liver stiffness(LS)measured by two-dimensional shear wave elastography may help in assessing liver fibrosis and liver condition.Chronic hepatitis B(CHB)is an important risk factor for HCC progression,but LS was found to be less reliable in assessing liver fibrosis following hepatitis viral eradication.We hypothesize that the status of hepatitis virus infection would affect the accuracy of LS in assessing the liver condition.AIM To test the feasibility and impact factors of using LS to assess liver condition in patients with HCC and CHB.METHODS A total of 284 patients were retrospectively recruited and classified into two groups on the basis of serum CHB virus hepatitis B virus(HBV)-DNA levels[HBV-DNA≥100.00 IU/mL as Pos group(n=200)and<100.00 IU/mL as Neg group(n=84)].Correlation analyses and receiver operating characteristic analyses were conducted to evaluate the relationship between LS and liver condition.RESULTS A significant correlation was found between LS and most of the parameters considered to have the ability to evaluate liver condition(P<0.05).When alanine aminotransferase(ALT)concentrations were normal(≤40 U/L),LS was correlated with liver condition indices(P<0.05),but the optimal cutoff of LS to identify a Child-Pugh score of 5 was higher in the Neg group(9.30 kPa)than the Pos group(7.40 kPa).When ALT levels were elevated(>40 U/L),the correlations between LS and liver condition indices were not significant(P>0.05).CONCLUSION LS was significantly correlated with most liver condition indices in patients with CHB and HCC.However,these correlations varied according to differences in HBV-DNA and transaminase concentrations.
文摘脑小血管病(small vessel disease,SVD)是一类以脑内小血管受损为主的临床影像综合征,可能会导致卒中、血管性认知障碍、神经心理疾病与其他功能障碍等。自2013年血管性神经病变的影像报告标准(standards for reporting vascular changes on neuroimaging,STRIVE)发布以来,SVD的神经影像学特征得到了初步的分类与标准化。然而,在临床实践与科学研究中,对SVD影像特征的认识和应用仍存在诸多不一致和不规范之处。随着对SVD病理生理机制的深入探索与影像技术的不断进步,新的SVD影像特征和定量标志物被相继发现,为SVD的诊断和评估提供了更为全面且精准的信息。在此基础上,STRIVE-2应运而生,以期能更全面地揭示SVD对脑功能与结构的影响。为了规范中国SVD的神经影像学评估和诊断,本共识将在STRIVE-2的基础上,结合中国具体国情,对SVD的神经影像学特征进行深入解读,旨在推动SVD影像学诊断术语的标准化,提高临床诊断的准确性,进一步促进相关领域的研究与进步。
文摘ⅠI have not done much preparation for today,since it is the end of the year and I have my hands full.Over the past years,I have had several opportunities to express my opinions,and I do not really have any new ones.Today,I look forward to taking some specific questions from you to exchange our ideas,so I hope this lecture will be rewarding for you.
文摘目的:骨水泥强化椎弓根螺钉技术近年来被广泛应用于合并骨质疏松的脊柱内固定手术中,可以显著提高固定强度,但与常规椎弓根螺钉内固定比较是否更具有优势尚缺乏循证医学定论。文章系统评价骨水泥强化椎弓根螺钉固定治疗骨质疏松性胸腰椎退行性疾病的临床疗效及安全性。方法:在中国知网、中国生物医学文献、万方、维普、PubMed、Cochrane Library、Web of Science以及Embase数据库中,检索有关传统椎弓根螺钉与骨水泥强化螺钉固定治疗骨质疏松性胸腰椎退行性疾病的临床对照研究,按相关标准对文献进行筛选和质量评价,采用Rev Man 5.4软件进行Meta分析。结果:①纳入2篇随机对照研究和18篇回顾性队列研究,共20篇文献,包括1566例患者,其中骨水泥强化螺钉组789例,传统螺钉组777例;②Meta分析结果显示,骨水泥强化螺钉组术后日本矫形外科协会评分、椎间隙高度及融合率均高于传统螺钉组(MD=1.60,95%CI:1.14,2.07,P<0.00001;MD=1.26,95%CI:0.62,1.90,P=0.0001;OR=11.24,95%CI:2.86,44.14,P=0.0005),手术时间长于传统螺钉组(SMD=0.82,95%CI:0.42,1.23,P<0.0001),术后目测类比评分、Oswestry功能障碍指数及螺钉松动率均低于传统螺钉组(MD=-0.50,95%CI:-0.78,-0.21,P=0.0007;SMD=-0.49,95%CI:-0.88,-0.10,P=0.01;OR=0.08,95%CI:0.05,0.12,P<0.00001),两组间住院时间、术中出血量、术后引流量比较差异无显著性意义(P>0.05)。结论:相较于传统椎弓根螺钉固定,骨水泥强化椎弓根螺钉固定治疗骨质疏松性胸腰椎退行性疾病时更能有效改善术后融合率及椎间隙高度、降低术后螺钉松动率,提高远期临床疗效。
